在googleMap 中添加MAPabc的地图类型

function addMAPabc(map){//添加MAPabc的瓦片 参数为地图对象
	var _tileSize = new google.maps.Size(256,256);
	var getTileUrl = function(tile,zoom){
		return "http://emap" + ((tile.x + tile.y) % 4) + ".mapabc.com/mapabc/maptile?v=w2.99&x=" + tile.x + "&y=" + tile.y + "&zoom=" + (17-zoom);
	};
	var imageMapType = new google.maps.ImageMapType({alt:"MAPabc",isPng:true,maxZoom:18,minZoom:1,name:"MAPabc",tileSize: new google.maps.Size(256, 256),opacity:1.0,getTileUrl:getTileUrl});
	map.mapTypes.set('MAPabc',imageMapType);
}
//效果见www.gpsoo.net 或者 www.goocar.net 中的全国体验